[PD] pdgst and videoloopback

[Jack]

Hello Benjamin,

Yes, I tried with ffdec_h264 but it is very, very slow compared to
avdec_h264 which, if i am right, is only available with gst-launch-1.0.
And, if i am right (again), v4l2sink doesn't work with gst-launch-1.0.
So I have to imagine a workaround, like a pipe : gst-launch-1.0 ->
gst-launch-0.10 -> v4l2sink.
If someone have a recommandation ?
Thanx.
++

Jack



Le 16/11/2015 13:19, Benjamin ~ b01 a écrit :
> Hello,
> 
> we successfully managed to get video stream into Gem/pix_video with
> v4l2loopback booth with gstreamer and ffmpeg, we used ffmpeg at the end,
> maybe some help by there :
> http://wiki.labomedia.org/index.php/AstroFluxTechnique#Pour_Debug
> http://wiki.labomedia.org/index.php/AstroFluxTechnique#Minicaster_Stream
> we used a compiled version of v4l2loopback
> https://github.com/umlaeute/v4l2loopback to get the latest version
> and a static version of ffmpeg or a self compiled version of ffmpeg in
> function of the codec needs
> 
> ++
> b
> 
> Le 12/11/2015 18:42, Jack a écrit :
>> Hello,
>>
>> I would like to use pdgst to play a video stream in Gem.
>>
>> I tried with the vlc plugin :
>> device tcp://192.168.1.101:5555
>>
>> ... but like with :
>> $ vlc tcp://192.168.1.101:5555
>>
>> ... i got a black screen.
>>
>> I tried with gstreamer :
>> $ gst-launch-1.0 tcpclientsrc host=192.168.1.102 port=5555 ! h264parse !
>> avdec_h264 ! xvimagesink
>>
>> ... and i get the stream and everything is OK :)
>>
>>
>> So, I decided to use v4l2loopback to get the stream on /dev/video1, but
>> after :
>> # modprobe v4l2loopback
>> $ gst-launch-1.0 tcpclientsrc host=192.168.1.102 port=5555 ! h264parse !
>> avdec_h264 ! v4l2sink device=/dev/video1
>>
>> ... i got :
>> Setting pipeline to PAUSED ...
>> Pipeline is PREROLLING ...
>> ERROR: from element
>> /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0: Internal data flow
>> error.
>> Additional debug info:
>> gstbasesrc.c(2943): gst_base_src_loop ():
>> /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0:
>> streaming task paused, reason not-negotiated (-4)
>> ERROR: pipeline doesn't want to preroll.
>> Setting pipeline to NULL ...
>> Freeing pipeline ...
>>
>> So I can't use pdgst nor pix_video to read the stream.
>>
>> I also tried with :
>> $ gst-launch-0.10 tcpclientsrc host=192.168.1.102 port=5555 ! h264parse
>> ! avdec_h264 ! xvimagesink
>>
>> but gstreamer (gst-launch-0.10) can't find the module "avdec_h264" (and
>> i can't get ffdec_h264 on my system, dont't know why yet).
>> Any suggestion to get the stream in Pd/Gem ?
>> Thanx.
>> ++
>>
>> Jack
>>
>>
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> 
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